Since you were not specific - in A machine shop, or MY machine shop. In A machine shop, cam jack knurler, probably out of 4140 or A2, and heat treated, then surface ground. MY machine shop - still digging out of the tornado and need to inventory tools, spider for the headstock, take the old Craftsman apart and figure out why the spindle axis is up and away from the tail.... And put the wood working tools back together since the rebuild is going to start pretty soon. If this virus thing shuts the plant down, I may have to remember all the other projects. This place can give you more ideas than I have time for.